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Discovery of very-high-energy gamma-ray emission from the vicinity of PSR J1913+1011 with H.E.S.S

F. Aharonian A.G. Akhperjanian A.R. Bazer-Bachi 1 B. Behera M. Beilicke W. Benbow D. Berge K. Bernlöhr C. Boisson 2 O. Bolz V. Borrel 1 I. Braun E. Brion 3 A.M. Brown R. Bühler T. Bulik I. Büsching T. Boutelier 4 S. Carrigan P.M. Chadwic L.-M. Chounet 5 A.C. Clapson G. Coignet 6 R. Cornils L. Costamante B. Degrange 5 H.J. Dickinson A. Djannati-Ataï 7 W. Domainko L.O'C. Drury G. Dubus 5 J. Dyks K. Egberts D. Emmanoulopoulos P. Espigat 8 C. Farnier 9 F. Feinstein 9 A. Fiasson 9 A. F¨orster G. Fontaine 5 Y. Fukui Seb. Funk S. Funk M. Füßling Y.A. Gallant 9 B. Giebels 5 J.F. Glicenstein 3 B. Glück P. Goret 3 C. Hadjichristidis D. Hauser M. Hauser G. Heinzelmann G. Henri 4 G. Hermann J.A. Hinton A. Hoffmann W. Hofmann M. Holleran S. Hoppe D. Horns A. Jacholkowska 9 O.C. de Jager E. Kendziorra M. Kerschhagg B. Khélifi 5 Nu. Komin 9 K. Kosack G. Lamanna 6 I.J. Latham R. Le Gallou A. Lemière 8 M. Lemoine-Goumard 5 J.-P. Lenain 2 T. Lohse J.M. Martin 2 O. Martineau-Huynh 10 A. Marcowith 9 C. Masterson G. Maurin 8 T.J.L. Mccomb R. Moderski Y. Moriguchi Emmanuel Moulin 9 M. de Naurois 10 D. Nedbal S.J. Nolan J.-P. Olive 1 K.J. Orford J.L. Osborne M. Ostrowski M. Panter G. Pedaletti G. Pelletier 4 P.-O. Petrucci 4 S. Pita 8 G. P¨uhlhofer M. Punch 8 S. Ranchon 6 B.C. Raubenheimer M. Raue S.M. Rayner O. Reimer M. Renaud J. Ripken L. Rob L. Rolland 3 S. Rosier-Lees 6 G. Rowell B. Rudak J. Ruppel V. Sahakian A. Santangelo L. Saugé S. Schlenker R. Schlickeiser R. Schroder U. Schwanke S. Schwarzburg S. Schwemmer A. Shalchi H. Sol 2 D. Spangler Ł. Stawarz R. Steenkamp C. Stegmann G. Superina 5 T. Takeuchi P.H. Tam J.-P. Tavernet 10 R. Terrier 8 C. van Eldik G. Vasileiadis 9 C. Venter J.P. Vialle 6 P. Vincent 10 M. Vivier 3 H.J. Volk F. Volpe 5 S.J. Wagner M. Ward
Abstract : The H.E.S.S. experiment, an array of four Imaging Atmospheric Cherenkov Telescopes with high sensitivity and large field-of-view, has been used to search for emitters of very-high-energy (VHE, >100 GeV) gamma-rays along the Galactic plane, covering the region 30 deg < l < 60 deg, 280 deg < l < 330 deg, and -3 deg < b < 3 deg. In this continuation of the H.E.S.S. Galactic Plane Scan, a new extended VHE gamma-ray source was discovered at alpha(2000)=19h12m49s, delta(2000)=+10d09'06'' (HESS J1912+101). Its integral flux between 1-10 TeV is ~10% of the Crab Nebula flux in the same energy range. The measured energy spectrum can be described by a power law with a photon index Gamma = 2.7+-0.2(stat)+-0.3(sys). HESS J1912+101 is plausibly associated with the high spin-down luminosity pulsar PSR J1913+1011. We also discuss associations with an as yet unconfirmed SNR candidate proposed from low frequency radio observation and/or with molecular clouds found in 13CO data.
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Submitted on : Tuesday, March 4, 2008 - 5:36:23 PM
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F. Aharonian, A.G. Akhperjanian, A.R. Bazer-Bachi, B. Behera, M. Beilicke, et al.. Discovery of very-high-energy gamma-ray emission from the vicinity of PSR J1913+1011 with H.E.S.S. Astronomy and Astrophysics - A&A, EDP Sciences, 2008, 484, pp.435-440. ⟨10.1051/0004-6361:20078715⟩. ⟨in2p3-00260702⟩



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